Troy Davis asks Supreme Court to stop execution

CBS News - Troy Davis, the condemned inmate who convinced hundreds of thousands of people but not the justice system of his innocence, filed an eleventh-hour plea Wednesday asking the U.S. Supreme Court to stop Georgia authorities from executing him for the murder of an off-duty police officer.

Though Davis' attorneys say seven of nine key witnesses against him have disputed all or parts of their testimony, state and federal judges have repeatedly ruled against granting him a new trial. As the court losses piled up Wednesday, his offer to take a polygraph test was rejected and the pardons board refused to give him one more hearing.  Read more.